nǐ / bié / zài / dān / xīn / le / zhè / jiàn / shì / wǒ / huì / chǔ / lǐ / hǎo / ràng / nǐ / kuān / xīn

你别再担心了，这件事我会处理好，让你宽心。

Stop worrying; I will handle this matter well and put your mind at ease.